Phonograph-diaphragm.



- H. D. PENNE-Y.

PHONOGRAPH DIAPHRAGM.

APPLICATION FILED JUNE 28. 1916.

1,236,476 Patented Aug. 14, 1917.

Wl'irzeflsge: I Inventor: flarold;fll enney UNITED STATES PATENT OFFICE.

HAROLD D. PENNEY, 0F PELHAM, NEW YORK, ASSIGNOR T0 ROBERT L. MOELROY. OF

NEW YORK, N. Y.

PHONOGRAPH-DIAPHRAGM.

Specification of Letters Patent.

Patented Aug. 14, 1917.

Application filed June 28, 1916. Serial No. 106,303.

To all whom it may won 1mm Be it known that l. l-luanuo D, Pi'nxnr, acitizen oi the United States, residing in lelham. in the counly ol'\Vcstrhester and State ot- New York, have invented certain new anduseful l'm norements in lhonograph-Diaphragms, o1 whieh the iollmving isa specification.

My present invention relates to an improvement in mountings 'l'ordiaphragms for talking machines and other diaphragm uses, andcolitemplal'es the use of a IlUIPlCllHlOTllllg mounting for a diaphragmplate wherein the same is held in floating eoi'vpcralion with itsrelative cooperating parts.

The main object o'-[' my invention contemplates the use of adiaphragm'disk. or plate, having mounted thereon a beaded or annularconnecting means. preferably. of anonvibrating, 1ion- \;'ieldiugmaterial and a housing mounting therefor, and the introductiontherebetween of a resilient or yielding material whereby the diaphragmmay be firmly anchored to its housing without metallie contacttlwre\\'it-h, and at the same time be permitted maximum vibration.

In the drawinga-accompanying herewith. Figure l. is a l'rout elevationof my device.

Fig. 2 is a quarter sectional view taken on the lines 23, of Fig. 2.

Fig. I is an enlarged fragmenlal sectional. view.

Fig. l is a sectional view oi one means or mounting said diaphragm foruse.

My present device has for ils accomplishment lhe same purpose as is setforth in my copcnding application,- Serial No. 106,304, liled June 2S,1916, wherein there is also shown the use of a resilient or yieldingmeans between the diaphragm disk and its mounting l'ramo .or anchorage,whereby the said diaphragm is held in such lloating connection as willpermit o l greater aluplitude or moreuu-nt of said diaphragm. as awhole, when in use, andas applied to phonographs, allerting a greatervolume of air through such movement, and thereby increasing the tonevolume, and, at the same tiuie so'l'tening the metallic tones that wouldoccur by the use of a diaphragm supported at its peripheral edge hy'a.rigid metallic'support.

In the present modification, as indicated in the ligures, l provide -adiaphregal-plate, or disk l, with a rigidly mounted beaded edge orperipheral bead-ring 2, of substantially key hole form in cross section,having the annular securing flange 5 formed integral therewith, andextending at a rightangle, or substantially a right angle, to the innerannular peripheral diaphragm reeeiving slit of the head-ring 2; althou hbead-rings of other form of section may e used. In forming thisbead-ring, I prefer to form the same ofsome material, which, whilecomparatively solid, is of an ext-rudahle or plastic nature, such aslead or any of its alloys. or of other known noirresili ntlike.substantially solid substance. Such head-ring is constructral in such amanner as to have a'slit in the inner peripheral wall, to receive andfirmly encompass the peripheral edge, and may be firmly swa ed intoposition. thereon by the use of suitsible dies; but I have not thoughtit essential to show or describe such operation herein.

The anchorage-Ting or frame 3, by whichthe disk isheldjfi position inthe sound box, may be of the customary annular form shown, or maybe anintegral member of the sound-box or-reprodueer, The frame 3 is usuallyprovided with an annular securingring or flange 4, usually andpreferably of the same thickness and length, and of the same diameter asis the securing-flange of the bead-ring 5, so that when the ring orFrame 3 is opposite to 5, the flanges 2 and t will be opposed and inregistry.

As in my copending application, a mold, denoted by 0, is provided,formed of two halves 7 and 8; the said mold members or halves beingprovided with a moldcavity 10, for holding the frame-ring 3, and thodiaphragm 1, carrying the annular bead-.

ring 2,-iu operative relation; and a yieldingamiular mid-ring is formedin the .mold cavity of space 10, between the mold pieces" 7 and b: asshown in Figs. 3 and 4, either by vulcanization or other suitablemethod; so as to bind lhe diaphragm 1 carrying the head-ring 2, theyielding elastic mid-ring, and the peripheral male-threaded anchorage orframe 3, into one homogeneous structure, and such mid-ring, is usuallyformed of pure elastic Para rubber; and in the vulcanization oi the samein the mold, as shown in Fig. 4, the rubber is firmly cemented to thellauges of metal. 2 and 4 respectively, so that it requires eonsiderableforce to tear them apart. j

When so formed, while not lessening to volume of'tone.

It is ob 1011's that many modifications may be made nihe-shape in. crosssection, or

otherwise of the frame 3. of the bead-ring 2, or of the yieldingsecuring mid-ring 10 that unifies them in a homogeneous singlestructure, without departing from the scope of my invention.

I claim:

1. A diaphragm mounting of the class: described comprising a rigid framehaving a yielding annular body affixed thereto, and diaphragm having aperipheral member embedded in said yielding body.

2. A diaphragm mounting of the class de scribed, comprlsing a rigidframe having a yielding annular body ailixed thereto, and a diaphragmhaving a beaded peripheral member embedded in said yielding-body.

i 3. A diaphragm having a peripheral non- -yielding bead iattachedthereto which head is provided with an annular securingflange extendingtherefrom at a right angle to the plane of the diaphragm.

' 4. A diaphragm mounting for phonegraph di'aphragms comprising adiaphragm having a non-yielding annular bead, an an nular frame thereforof non-yielding mate rial; and a 'yieldingannular body connect-- ingsaid diaphragm. and said. frame: together,

5. A diaphragm mounting of the class described comprisin a rigid framehaving a yielding body a xed thereto, and a diaphragm having a memberembedded in said yielding body.

v 6. A diaphragm mounting for phonov graph diaphragms, comprising adiaphragm having aperip on, and a rigid annular frame or member eralnon-yie1dmg bead theretherefor, having a resilient material moldedtlicrcl'irt\\'uon; thereby 'lorn'iing a yielding body for connectingsaid diaphragm-bead and. said .l'reniu. together; whereby said diaphragmwill be held. in floating relation therewith.

7. The combination with an annular metallic securing member or ring,having an annular securing flange projecting from one face adjacent tothe center of the periphery of'the ring; a dia 'ihragm having aperipheral bead scc'l'lred thereto having a peripheral linnge projectingtoward the like peri 1l1crnl-llnngc ol lhe s 2l.: |n'ing-ring; andmid-ring formed of soft resilient material securing tin flangedscouring-ring and the iliai 'ilii'zlgii'i bond together so as to form aflouting annular resilient support for the dia 'ihrngm.

8. A diaphragm having a member arranged lo hold the edge of thediaphragm and a securing member extending from the diaphragm holdingmember,

9. A diaphragn'ihaving a member arranged to hold the ofthe diaphragm anda securing mcn'iber extending from the diaphragmholding member at anangle to the plane of the diaphragm.

10. A diaphragm mounting of the class described comprising a rigidframe, having a securing member extending therefrom, a

diaphragm having a member arrangedto hold the diaphragm. and a securingmember extending therefrom, and a yielding'conneetin g member joiningthe securing members of the frame and diaphragm respectively.

11. A diaphragm moi'lnting of the class described comprising a rigidframe having a securing member extending therefrom at right angles, adiaphragm having a member arranged to hold the diaphragm and. a securingmember extending therefrom at right angles, and a yielding connectingmember joining the securing members of the frame and diay hrag1nrespecti ely.

HAROLD D.

/Vitnesses: v

JAMJIES Power, HENRY I. Smcnn

